Brother Premium wax ribbons for 4-inch label printers Black ribbon Premium wax 110mm x 450m. Box of 8 ribbons. For Coated/uncoated paper and tags high gloss paper. Compatible with Brother 4-inch industrial label printers TJ-4020TN/ TJ-4120TN/ TJ-4021TN/ TJ-4121TN. Wax ribbons are recomende to use to print onto paper labels to stay inside or in a dry place. Should not be used for printing on fabric, leather, metallic paper. Use Wax ribbon can lower print head temperature to extend printhead life.